SOLUTION: I really don't understand... Find the axis of symmetry. y=x^2+5x-7 Thank you!

Question 110042: I really don't understand...
Find the axis of symmetry.
y=x^2+5x-7
Thank you!
Found 2 solutions by edjones, josmiceli:
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
y=ax^2+bx+c
y=x^2+5x-7
.
-b/2a is the formula for axis of symmetry and the maximum or minimum at x of a parabola.
-5/2=-2.5=axis of symmetry.
Look at the graph.
Ed

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Symmetry means that it looks the same on both sides of the axis.
Do you know the quadratic formula? That's how I figure out the
axis of symmetry. The formula is:

rewite it as

The first term is the axis of symmetry, and the 2nd term gives you a
value of x on the = side and one on the - side
So find
The equation is
This is in the form

x = -5/2 is the axis of symmetry
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